One thing thats missing is more visiable recticles. The white ones disapear into the sky and snow.
Yeah, you're right, it would be enough to change its colour, green would be better on dark scenarios, red would be better on Nivosus and similars.
It would be good to have more colours to choose!
And also: sometimes is difficult to quickly see the little red symbol of enemy carrying flag when playing on red gamefield (that one with volcanic craters, dont remember the name).